Indic Loanwords in Spoken Thai: William J. Gedney, 1947
The acknowledged father of modern Tai linguistics, Gedney's PhD thesis
was the first formal, large-scale study of Pali and Sanskrit loans in modern Thai.
Gedney's thesis differed from contemporary Thai analyses by ignoring
orthography, and instead focusing on predictable, regular, phonemic change.
A half-century later, Gedney still provids an
unequalled picture of Thai's historical development.

The detailed table of contents below is linked to a set of (unbundled) DjVu files.
Note that the front matter is stored in the last few files in order to
preserve the original page numbering for the body of the thesis.
Unfortunately, this is a 4th or 5th generation copy, and quality of
some pages may vary.